Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 261, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2021.124223
Keywords
Er3+ doped glasses; Judd; Ofelt (JO) and McCumber theory; Gain spectra characteristics
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Funding
- University Grants Commission of India (UGCIndia) through Special Assistance Programme (SAP) Departmental Research Support (DRS) [F.530/12/DRS/2009(SAP1)]
- Department of Science & Technology (DST), India through DST-PURSE P II [SR 417, SR 416]
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The multicomponent borosilicate glasses activated with different concentrations of Er3+ ions were studied for their radiative characteristics and luminescence properties, showing potential for optical amplifier and laser applications due to their improved gain spectra in the NIR region.
The multicomponent borosilicate (MBSER) glasses activated with different concentrations of Er3+ ions (varies from 0.1 to 2 mol%) were prepared via conventional melting and rapid quench technique and studied their thermal, structural and spectroscopic characteristics by using DSC, XRD, FTIR, optical absorption, excitation and emission measurements. Judd- Ofelt analysis in correlation with the absorption and emission spectral profiles was performed for the evaluation of several radiative parameters of the as-prepared glasses. Visible and NIR luminescence were recorded at 379 nm excitation and a special consideration is given to 1536 nm emission corresponding to the I-4(13/2) -> I-4(15/2) transition. McCumber theory (MC) is used to determine the stimulated emission cross-section from the calculated absorption cross-section and is found well matched with the emission cross-section obtained from Fuchtbauer-Ladenburg (FL) equation. Better radiative parameters (stimulated emission cross-section (sigma(emi)) = 15.78 x 10(-21) cm(2), effective bandwidth (Delta lambda(eff)) = 67 nm), laser (gain bandwidth (sigma(lambda(p)) x Delta lambda(eff )= 1.05 x 10(-25) cm(3)), optical gain (sigma(lambda(p)) x tau(R)) = 42.5 x 10(-25) cm(2) s)) and gain spectra characteristics suggests the MBSER glasses for optical amplifier and laser applications since they offer a broadened emission spectra in the NIR region.
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